LEADTOOLS Recognition Imaging SDK是精選的LEADTOOLS SDK功能集，旨在在企業(yè)級文檔自動化解決方案中構(gòu)建端到端文檔成像應(yīng)用程序，這些解決方案需要OCR，MICR，OMR，條形碼，表單識別和處理，PDF，打印捕獲 ，檔案，注釋和圖像查看功能。 這套功能強大的工具利用LEAD屢獲殊榮的圖像處理技術(shù)，智能識別可用于識別和提取任何類型的掃描或傳真形式圖像數(shù)據(jù)的文檔功能。

點擊下載LEADTOOLS Recognition Imaging SDK試用版

使用最先進的表單處理API可以自動解決數(shù)據(jù)輸入問題 。無論您是在處理客戶調(diào)查，稅務(wù)文件還是開票記錄，每個行業(yè)都每天使用表格開展業(yè)務(wù)。將數(shù)據(jù)從紙張移動到數(shù)字介質(zhì)可能會很耗時。因此，LEADTOOLS開發(fā)了專有功能，可以從包含機器打印文本， 手寫文本， MICR， MRZ和 OMR字段的任意組合的圖像中提取文本 。LEADTOOLS將自動檢測并識別所有內(nèi)容！以下是快速且準(zhǔn)確地處理各種表單類型的主要步驟，無論數(shù)據(jù)如何格式化。

首先，我們需要初始化表單引擎。這完成了讀取和識別數(shù)據(jù)的所有艱苦工作：

static void InitFormsEngines()
{
Console.WriteLine("Initializing Engines");
codecs = new RasterCodecs();
recognitionEngine = new FormRecognitionEngine();
processingEngine = new FormProcessingEngine();
formsOCREngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD);
formsOCREngine.Startup(codecs, null, null, @"C:\LEADTOOLS21\Bin\Common\OcrLEADRuntime");
OcrObjectsManager ocrObjectsManager = new OcrObjectsManager(formsOCREngine);
ocrObjectsManager.Engine = formsOCREngine;
recognitionEngine.ObjectsManagers.Add(ocrObjectsManager);

Console.WriteLine("Engines initialized successfully");
}

下一步是指定主表單：

private static void CreateMasterFormAttributes()
{
Console.WriteLine("Processing Master Form");
string[] masterFileNames = Directory.GetFiles(@"C:\LEADTOOLS21\Resources\Images\Forms\MasterForm Sets\OCR", "*.tif", SearchOption.AllDirectories);

foreach (string masterFileName in masterFileNames)
{
string formName = Path.GetFileNameWithoutExtension(masterFileName);
using (RasterImage image = codecs.Load(masterFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, -1))
{
FormRecognitionAttributes masterFormAttributes = recognitionEngine.CreateMasterForm(formName, Guid.Empty, null);
for (int i = 0; i < image.PageCount; i++)
{
image.Page = i + 1;
recognitionEngine.AddMasterFormPage(masterFormAttributes, image, null);
}
recognitionEngine.CloseMasterForm(masterFormAttributes);
File.WriteAllBytes(formName + ".bin", masterFormAttributes.GetData());
}
}
Console.WriteLine("Master Form Processing Complete");
Console.WriteLine("=============================================================");
}

private static void RecognizeForm()
{
Console.WriteLine("Recognizing Form\n");
var GetProjectDirectory = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
string formToRecognize = @"C:\LEADTOOLS21\Resources\Images\Forms\Forms to be Recognized\OCR\W9_OCR_Filled.tif";
using (RasterImage image = codecs.Load(formToRecognize, 0, CodecsLoadByteOrder.BgrOrGray, 1, -1))
{
FormRecognitionAttributes filledFormAttributes = recognitionEngine.CreateForm(null);

for (int i = 0; i < image.PageCount; i++)
{
image.Page = i + 1;
recognitionEngine.AddFormPage(filledFormAttributes, image, null);
}
recognitionEngine.CloseForm(filledFormAttributes);

string resultMessage = "The form could not be recognized";
string[] masterFileNames = Directory.GetFiles(GetProjectDirectory, "*.bin");

foreach (string masterFileName in masterFileNames)
{
string fieldsfName = Path.GetFileNameWithoutExtension(masterFileName) + ".xml";
string fieldsfullPath = Path.Combine(@"C:\LEADTOOLS21\Resources\Images\Forms\MasterForm Sets\OCR", fieldsfName);
processingEngine.LoadFields(fieldsfullPath);
FormRecognitionAttributes masterFormAttributes = new FormRecognitionAttributes();
masterFormAttributes.SetData(File.ReadAllBytes(masterFileName));
FormRecognitionResult recognitionResult = recognitionEngine.CompareForm(masterFormAttributes, filledFormAttributes, null);
if (recognitionResult.Confidence >= 80)
{
List<PageAlignment> alignment = new List<PageAlignment>();
for (int k = 0; k < recognitionResult.PageResults.Count; k++)
alignment.Add(recognitionResult.PageResults[k].Alignment);

resultMessage = $"This form has been recognized as a {Path.GetFileNameWithoutExtension(masterFileName)}";
ProcessForm(image, alignment);
break;
}
}

Console.WriteLine(resultMessage, "Recognition Results");
Console.WriteLine("=============================================================\n");
}
}

private static void ProcessForm(RasterImage image, List<PageAlignment> alignment)
{
processingEngine.OcrEngine = formsOCREngine;
string resultsMessage = string.Empty;

processingEngine.Process(image, alignment);
foreach (FormPage formPage in processingEngine.Pages)
foreach (FormField field in formPage)
if (field != null)
resultsMessage = $"{resultsMessage}{field.Name} = {(field.Result as TextFormFieldResult).Text}\n";

if (string.IsNullOrEmpty(resultsMessage))
Console.WriteLine("No fields were processed", "FieldProcessing Results");
else
Console.WriteLine(resultsMessage, "Field ProcessingResults");
}

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